Calendar refill offers a simple way to refill your standard, No. 17 calendar base. Planning pages range 12 months from January to December. Weekdays offer two-page spreads with ruled, half-hour appointment times from 7 AM to 5 PM; holidays; and past, current and future monthly calendar references. Saturdays and Sundays get one page each and still feature ruled appointment times. Calendar pages contain a high percentage of post-consumer recycled material.